Add !$omp parallel do collapse(2) directives to all triple-loop
stencil kernels (fderivs, fdderivs, fdx/fdy/fdz, kodis, lopsided,
enforce_ag/enforce_ga) across all ghost_width variants. Add !$omp
parallel workshare to RK4/ICN/Euler whole-array update routines.
Build system: add -qopenmp to compile and link flags, switch MKL
from sequential to threaded (-lmkl_intel_thread -liomp5).
Runtime: set OMP_NUM_THREADS=96, OMP_STACKSIZE=16M, OMP_PROC_BIND=close,
OMP_PLACES=cores for 96-core server target.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Add mpi_stub.h providing all MPI types/constants/functions as no-ops
(nprocs=1, myrank=0) with memcpy-based Allreduce and clock_gettime Wtime
- Replace #include <mpi.h> with conditional #ifdef MPI_STUB in 31 files
(19 headers + 12 source files) preserving ability to build with real MPI
- Change makefile.inc: CLINKER mpiicpx->icpx, add -DMPI_STUB to CXXAPPFLAGS
- Update makefile_and_run.py: run ./ABE directly instead of mpirun -np N
- Set MPI_processes=1 in AMSS_NCKU_Input.py
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Update makefile.inc with Intel oneAPI compiler flags and oneMKL linking
- Configure taskset CPU binding to use nohz_full cores (4-55, 60-111)
- Set build parallelism to 104 jobs for faster compilation
- Update MPI process count to 48 in input configuration
Bind all computation processes (ABE, ABEGPU, TwoPunctureABE) to
CPU cores 4-55 and 60-111 using numactl --physcpubind to prevent
interference with system processes on reserved cores.
